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VulnerabilityPublished

CVE-2026-117892: Mozilla Firefox · Privilege escalation due to use-after-free in the WebRTC: Networking component

Affects Mozilla FirefoxSource CVE Database V5

0

Not known to be exploited.

Data as of 27 Oct 2026, 15:42 UTC

Severity
High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

AI-suggested

Users and administrators should update Firefox to version 159 or later, or Firefox ESR to versions 115.44 or 153.6 or later, where this vulnerability is fixed. Applying these official patches fully mitigates the risk from this vulnerability.

Description

CVE-2026-117892 is a high-impact privilege escalation vulnerability caused by a use-after-free flaw in the WebRTC Networking component of Mozilla Firefox. This vulnerability allows an attacker to escalate privileges within the affected environment. The issue was fixed in Firefox 159 and Firefox ESR versions 115.44 and 153.6.

References

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